NDA preparation is a multidimensional approach imbibing academic knowledge with physical fitness and mental prepare. Here is a blueprint to get you started:
Know the Exam Pattern and Syllabus: Well the NDA exam is divided into two papers:
Mathematics (300 marks)
General Ability Test (GAT) (600 marks), which includes:
English
General Knowledge (Physics, Chemistry, General Science, History, Geography, Current Affairs)
So, the first thing that you need to work upon is a clear and thorough understanding of the detailed syllabus for both these sections. You can refer to the official notifications by UPSC or trusted educational resources like Byju's or Gradeupudy Plan*:
Daily timetable with allocated time for every subject.
Revision and solving the previous years' question papers to get acquainted with question patterns and time management.
Focus on the weak areas, spend more time on preparation for such areas.
Mathematics Preparation:
Mathematics topics include Algebra, Trigonometry, calculus, and co-ordinate Geometry. These are very essential topics in terms of scoring marks.
Practice problem sets given in books like R.D. Sharma and M.L. Khanna.
Practicing continuously on online tests and solving problems of last year's papers build up the speed and helps gain accuracy really well .
General Ability Test (GAT):
English: Develop comprehension, vocabulary, and grammar. Grammar books by Wren & Martin and vocabulary books by Norman Lewis will help.
General Knowledge: Read newspapers, magazines, and online news sites. For static GK, read Lucent's GK or NCERT books on History, Geography, and General Science.
Physics and Chemistry: NCERT books for Classes 9 to 12 serve as a good base. For Physics also look at H.C. Verma.